XNBR胶乳/明胶共混物的性能研究

研究明胶用量对羧基丁腈橡胶(XNBR)胶乳／明胶共混物物理性能的影响。结果表明，随着明胶用量的增大，共混物的拉伸强度和硬度增大，拉断伸长率和冲击强度减小。红外光谱分析认为，XNBR胶乳与明胶的相容性较好是由于XNBR中的羧基与明胶中的氨基发生了反应或产生了相互作用。     

丙烯酸对废羧基丁腈橡胶/聚氯乙烯共混物性能的影响

以丙烯酸(AAc)接枝改性聚氯乙烯(PVC)和废羧基丁腈橡胶(WXNBR)共混物,在界面间生成化学键,增大两相界面间粘合力,改善了共混物的力学性能.结果表明加入少量丙烯酸,就能在不降低拉伸强度的条件下显著提高共混物的冲击强度,达到良好增韧效果.     

丁腈橡胶臭氧化制备羧基丁腈橡胶

以臭氧氧化丁腈橡胶合成了羧基丁腈橡胶,研究了反应时间、反应温度、臭氧通入量及丁腈橡胶胶液质量浓度对产物特性黏数和酸值的影响.结果表明,以丁腈橡胶臭氧化制备羧基丁腈橡胶,在实验范围内,反应温度升高、增大臭氧通入量和降低丁腈橡胶胶液质量浓度可以提高羧基丁腈橡胶的羧基含量,降低丁腈橡胶的相对分子质量.但是反应时间的影响较为复...     

丙烯酸对废羧基丁腈橡胶／聚氯乙烯共混物性能的影响

以丙烯酸（AAc）接枝改性聚氯乙烯（PVC）和废羧基丁腈橡胶（WXNBR）共混物,在界面间生成化学键,增大两相界面间粘合力,改善了共混物的力学性能。结果表明加入少量丙烯酸,就能在不降低拉伸强度的条件下显著提高共混物的冲击强度,达到良好增韧效果。     

明胶/XNBR复合膜的制备及其性能的研究

采用水溶液共混法制备明胶XNBR复合膜。对该膜制备条件的研究表明:在明胶、XNBR质量分数比为10:1,反应温度70℃,反应时间90min的条件下所得膜的力学性能较好。对明胶/XNBR复合膜和明胶/壳聚糖复合膜进行了对比研究,结果表明,明胶/XNBR复合膜较明胶/壳聚糖复合膜有更好的力学性能。     

粉末羧基丁腈橡胶/聚氯乙烯共混胶的研制

将羧基丁腈橡胶(XNBR)乳液与聚氯乙烯(PVC)乳液共混,然后用胶乳凝聚成粉法凝聚成粉。研究了凝聚成粉的工艺及条件,考察了XNBR/PVC配比对产品性能的影响。结果表明,在隔离剂质量分数为3%～5%、凝聚温度为50～60℃、搅拌转速为300～400r/min的条件下,可制得成粉率在95.0%以上、贮存不黏结且性能良好的不同配比的粉末XNBR/PVC共混胶。     

端羧基液体丁腈橡胶的制备方法

正由青岛旺裕橡胶制品有限公司申请的专利(公开号CN 104592424A,公开日期2014-05-06)"端羧基液体丁腈橡胶的制备方法",提供了一种端羧基液体丁腈橡胶的制备方法:(1)将聚合釜抽真空,加入乙醇和丙烯腈,再加入过氧化戊二酸,升温至80~90℃;(2)再次加入过氧化戊二     

氧化石墨烯增容及增强羧基丁腈橡胶/丁苯橡胶共混物（英文）

制备了氧化石墨烯/羧基丁腈橡胶/丁苯橡胶共混硫化胶,研究了氧化石墨烯对硫化胶的相容性和力学性能的影响。结果表明,氧化石墨烯可有效改善共混硫化胶的相容性,当氧化石墨烯用量为0.3份(质量)时,共混硫化胶的力学性能达到最佳,100%定伸应力、300%定伸应力、拉伸强度和撕裂强度分别提高了44%、107%、71%和94%。     

氢化丁腈橡胶/氢化羧基丁腈橡胶/多壁碳纳米管共混胶的硫化特性及动力学

将多壁碳纳米管进行硝酸氧化处理得到酸氧化多壁碳纳米管(mMWNTs),通过傅里叶变换红外光谱和热重分析表征了mMWNTs,考察了mMWNTs用量对氢化丁腈橡胶(HNBR)/氢化羧基丁腈橡胶(HXNBR)共混胶硫化特性的影响,并采用经典的自催化反应模型研究了共混胶的硫化动力学。结果表明,mMWNTs的表面含有羟基和羧基官能团,纯度得到提高,热稳定性有所降低;随着mMWNTs用量的增加,共混胶的焦烧时间和正硫化时间缩短,交联密度和硫化速率逐渐增大,加快了硫化反应进程;采用自催化反应模型可以很好地描述共混胶的硫化动力学,mMWNTs的加入可略微提高共混胶的硫化反应级数,降低共混胶的硫化反应活化能。     

动态硫化丁腈橡胶/二元共聚氯醚共混胶的制备与性能

采用动态硫化法制备了丁腈橡胶(NBR)／二元共聚氯醚(ECO)共混胶,研究了动态硫化温度、时间及不同丙烯腈含量的NBR对动态硫化胶性能的影响,对比了动态硫化胶和常规共混胶在性能上的差异。结果表明,当动态硫化温度为150℃．动态硫化时间为NBR的正硫化时间时,NBR／ECO共混胶中内聚能密度大的ECO为连续相。与常规共混胶相比,动态硫化胶具有低压缩永久变形及良好的力学性能、耐老化性能和耐油性能。     

氯醚橡胶/丁腈橡胶共混物的结构与性能

研究了不同并用比的氯醚橡胶（ECO）／丁腈橡胶（NBR）共混物的相态结构,力学性能,耐老化性能和耐油性能,透射电镜照片显示：ECO／NBR为70／30（质量份,下同）时共混物呈双连续相：为60／40和40／60时ECO都为分散相,且两相界面清晰。加入NBR降低了ECO的拉伸强度和看断伸长率,以及耐热空气老化性能,随着NBR用量的提高,共混物硫化胶在油中的体积变化率增加,ECO／NBR为70／30时硫化胶在100℃热油中的性能保持率最高,而且体积变化率与ECO的相当。     

氢化丁腈橡胶/乙烯丙烯酸酯橡胶共混胶的性能(英文)

研究了不同并用比例下氢化丁腈橡胶(HNBR)/乙烯丙烯酸酯橡胶(AEM)共混胶的物理机械性能、耐油性能、耐老化性能及动态力学性能。结果表明,HNBR和AEM具有很好的相容性,并用AEM后改善了HNBR的耐老化性能、抗压缩永久变形和低温性能。     

Morphology,mechanical and viscoelastic properties of nitrile rubber/epoxidized natural rubber blends

A new class of blend membranes from blends of nitrile rubber (NBR) and epoxidized natural rubber (ENR) has been prepared and their morphology, miscibility, mechanical, and viscoelastic properties have been studied. The ebonite method was used to study the blend morphology of the membranes. The morphology of the blends indicated a two‐phase structure in which the minor phase is dispersed as domains in the major continuous phase. The performance of NBR/ENR blend membranes has been studied from the mechanical measurements. The viscoelastic behavior of the blends has been analyzed from the dynamic mechanical data. An attempt was made to relate the viscoelastic behavior with the morphology of the blends. Various composite models have been used to predict the experimental viscoelastic data. The area under the linear loss modulus curve was larger than that obtained by theoretical group contribution analysis. The homogeneity of the system was further evaluated by Cole–Cole analysis. Finally, a master curve for the modulus of the blend was generated by applying the time–temperature superposition principle. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 97: 1561–1573, 2005     

官能化高乙烯基聚丁二烯橡胶与丁腈橡胶共混胶的性能

以氢化钠为活性剂、马来酸酐为改性剂,通过负离子反应对高乙烯基聚丁二烯橡胶(HVBR)进行官能化改性制备了官能化HVBR(FHVBR)。考察了FHVBR与丁腈橡胶(NBR)共混的质量比对FHVBR/NBR共混胶硫化特性、力学性能、耐热氧老化性能和电性能的影响,并通过差示扫描量热仪和扫描电子显微镜探讨了共混胶的两相相容性。结果表明,随着NBR用量的增加,FHVBR/NBR共混胶的硫化时间缩短、硫化效率提高,定伸应力和硬度增大,耐老化性能得以改善。NBR用量的增加使得FHVBR/NBR共混胶对不同频率下的微波吸收能力增强,共混胶的电阻率下降,导电性增强。然而,NBR用量增加导致共混胶的拉伸强度略有下降。     

丁腈橡胶增容丁苯橡胶/聚氯乙烯共混体系

采用一系列结合丙烯腈质量分数不同的丁腈橡胶(NBR)作为丁苯橡胶(SBR)／聚氯乙烯(PVC)不相容共混物的增容剂,研究了SBR／PVC／NBR硫化胶的力学性能,并用扫描电子显微镜、傅里叶变换红外光谱仪和动态黏弹仪研究了该硫化胶的形态结构与相容性。结果表明,结合丙烯腈质量分数为20％～26％的NBR是SBR／PVC的优良增容剂,可提高共混物的力学性能,使SBR相和PVC相达到微细均匀化分散,并在两相之间形成了界面层,使得增容效果达到最佳。     

丁腈橡胶/橡塑材料并用研究进展

综述了近年来国内外丁腈橡胶与天然橡胶、丁苯橡胶、卤化丁基橡胶、三元乙丙橡胶、聚丙烯、聚氯乙烯、乙烯-乙酸乙烯共聚物、聚酰胺及其他橡塑材料并用改性的研究进展.     

Durability studies of aluminium/ aluminium joints bonded by chlorobutyl rubber-carboxylated nitrile rubber and epichlorohydrin rubber-carboxylated nitrile rubber blends

Two novel rubber blends based on chlorobutyl rubber ( )-carboxylate nitrile rubber ( ) and epichlorohydrin rubber (ECO)-carboxylated nitrile rubber ( ) can be used as adhesives for aluminium/aluminium bonding. Incorporation of silica filler in the blend and carbon black in the blend improves joint strength. The adhesives show remarkable water and salt water resistance. The adhesives based on show remarkable heat and water resistance. Heat stability of the adhesives based on is not satisfactory but can be improved by the application of silane primer on the aluminium surface. Silane primer also improves the paraffin oil resistance. The increase in joint strength resulting from the application of silane primer is due to the formation of Si-O-Al linkages at the aluminium/primer interface.     

Investigation on the mechanical properties and oil resistance of sulfur cured nitrile rubber/hydrogenated nitrile butadiene rubber blends

Nitrile rubber (NBR)/hydrogenated nitrile butadiene rubber (HNBR) blends with various ratios were compounded with internal mixer and two-roll open mill. Mechanical properties and low-temperature performance (TR10) of the NBR/HNBR blends after aging under different conditions were investigated. Furthermore, equilibrium swelling test and moving die rheometer (MDR) test were used to systematically investigate the effects of HNBR dosage on the crosslink densities and curing behaviors. Vulcanization torque and crosslink densities decreased with an increase in HNBR content. The crosslink density of pure HNBR is higher than that of pure NBR, which is related to the macromolecular structures of the rubber. Compression sets of the NBR/HNBR vulcanizates were correlated with HNBR dosage indicating a linear relationship. Low-temperature performance of the NBR/HNBR blends was improved after being aged in the synthetic hydrocarbon hydraulic oils (SH-1 and SH-2). This work shows that the low-temperature performance and oil resistance could be better balanced by blending NBR with HNBR, while the mechanical properties maintain relatively high level.